Question

write an equation with four numbers, none of which are opposites, whose sum is 0. one example of opposites is -30 and 30.
□ + □ + □ + □ = 0

Explanation:

Step1: Pick non-opposite numbers

Choose 1, 2, -1, -2 (no pairs are opposites: 1 and -1 are opposites, so instead pick 1, 2, -3, 0? No, better: 1, 3, -2, -2? No, use distinct non-opposite: 1, 2, -3, 0 is invalid, wait: 2, 3, -4, -1. Check: 2 and -2 are opposites, but here none are opposites.

Step2: Verify sum equals 0

Calculate $2 + 3 + (-4) + (-1) = (2+3) + (-4-1) = 5 - 5 = 0$

Answer:

$2 + 3 + (-4) + (-1) = 0$

(Note: Other valid examples exist, such as $1 + 4 + (-2) + (-3) = 0$, as long as no two numbers are additive opposites.)